It is responsible for when a song gets stuck in your head and won't go away.
There is no known cure for music worms, but some treatments are:
Trying to replace one music worm with that of another song,
Trying to pass on your worm to another person ("host"),
Isolation from all music, TV and other forms of media (including elevators and muzak blaring grocery stores).
Oh, Mamma don't make me another meatloaf,
forget the Mac N' Cheese,
I want some fun on a bun,
I want a Manwich please!
(Repeated for 24 hours)
Damn music worm!!!! Get this out of my head!